- 477 - 



after scattered rains in south-central area. Medium to heavy and widespread in 

 Hays and Jackson Counties. (Green). FLORIDA - Averaged 147 per dairy cow near 

 Gainesville, Alachua County. (Head) , 



STABLE FLY ( Stomoxys calcitrans ) - WISCONSIN - Severe annoyance to cattle reported 

 in Sauk, Adams , and Calumet Counties. Slight to moderate annoyance in Chippewa, 

 St. Croix, Columbia, Rock, Polk, Outagamie, and Oconto Counties. Spraying underway 

 in most counties. (Wis. Ins. Sur.). NEBRASKA - Increasing, averaged 4-5 per leg on 

 animals in feedlots in Lincoln County. (Campbell, McEvoy) . 



BLACK FLIES ( Simulium spp.) - MAINE - Peak numbers attained in most sections. 

 Populations will decline in most areas next 14 days. (McDaniel) . NEBRASKA - 

 Troublesome on herds pastured on flood plain areas along Platte River in Lincoln 

 and Keith Counties. (Campbell, McEvoy). 



TABANID FLIES - VERMONT - Chrysops spp. increased on cattle in Champlain Valley. 

 (Nielsen, June 22). NEBRASKA - Chrysops spp. troublesome on herds pastured on 

 flood plain areas along Platte River in Lincoln and Keith Counties. (Campbell, 

 McEvoy). UTAH - Horseflies and deer flies troublesome in Duchesne, Uintah, and 

 Daggett County meadow areas (Mathis) , and in Honeyville and Fielding area of Box 

 Elder County, annoying horses and cattle (Knowlton) . 



MOSQUITOES - MAINE - Peak numbers attained in most sections. Populations will 

 decline in most areas next 14 days. (McDaniel). WISCONSIN - Biting continues 

 heavy in some lowland localities. Aedes cinereus dominant biter in Wisconsin 

 River bottomlands in western Dane County. A. vexans has not appeared yet. (Wis. 

 Ins. Sur.) OHIO - Biting by Aedes spp. and Culex spp. heavy in some areas of 

 Washington County. (Field). MINNESOTA - Of 133 larval collections during week 

 ending June 19 A . vexans found in 48 percent of samples. A. vexans heavily 

 dominant with 6-7 species of spring woodland pool mosquitoes very prominent in 

 all collections. Latter species very long lived and will continue to bite in 

 wooded areas into August. Total of 31,700 female mosquitoes collected in 16 light 

 traps during week ending June 18. Of these, 92.5 percent A. vexans . Light trap 

 catches declined significantly by June 24. Moderate rains in Minneapolis and 

 Saint Paul area on June 19 and 20 produced small brood of A. vexans . Survivors of 

 this brood may cause modest local increase in mosquito populations during week of 

 June 28. (Minn. Pest Rpt.). WYOMING - Very heavy and annoying man and animals 

 along Laramie River, Albany County. Counts ranged 400-600 per cow. (Spackman, 

 Lloyd). CALIFORNIA - Mosquito problem more acute past week due to hot weather. 

 Residents at Sacramento, Sacramento County, complained of high annoyance in yards 

 and at swimming pools. Complaints that bites are more serious than other years 

 quite general. Mosquito abatement districts being pressured to continue control 

 because of population levels and lack of effective material due to resistance. 

 (Cal. Coop. Rpt.) . 



SCREWWORM ( Cochliomyia hominivorax ) - Total of 5 cases reported in U.S. June 20-26 

 as follows: TEXAS - Jeff Davis, Jim Hogg, Bowie, Jim Wells, Mason. Total of 67 

 laboratory-confirmed cases reported in portion of Barrier Zone in Republic of 

 Mexico as follows: Sonora 10, Chihuahua 16, Coahuila 5, Nuevo Leon 7, Tamaulipas 

 29. Total of 43 cases reported in Mexico south of Barrier Zone. Barrier Zone is 

 area where eradication operation underway to prevent establishment of self- 

 sustaining population in U.S. Sterile screwworm flies released: Texas 39,358,000; 

 Arizona 3,310,000; Arkansas 400,000; Mexico 111,770,000. (Anim. Health Div.). 



HORSE BOT FLY ( Gas terophilus intestinalis ) - INDIANA - Larvae emerged June 14-18; 

 adults currently very abundanT"! (Chandler) . 



FACE FLY ( Musca autumnalis) - VERMONT - Increasing in Champlain Valley. (Nielsen, 

 June 22). WISCONSIN - Moderate to severe in Calumet, Chippewa, and Columbia 

 Counties. (Wis. Ins. Sur.) ILLINOIS - Increased rapidly past 2 weeks; now 

 annoying pastural cattle. State average 25 per animal, with individual herds 

 averaging up to 60 per head. Populations on increase again since summer of 1969; 

 summer 1970 could be worst yet. (Sur. Bull.). IOWA - Ranged 1-30 (averaged 11.2) 



